Chat inanely following introduction of this platform (7)
I believe the answer is:
'chat' is the definition.
(thesaurus)
I can't explain the remainder of the clue.
Can you help me to learn more?
(Other definitions for twitter that I've seen before include "Make bird noises" , "Palpitate" , "Chirpy social website" , "Make high-pitched sounds, as of birds" , "Latest craze in web-based messaging" .)